Question
Give four substances which contain water of crystallization and write their common name.

Answer

(i) $Na _2 CO _3 \cdot 10 H _2 O =$ Washing soda
(ii) $MgSO _4 \cdot 7 H _2 O =$ Epsom salt
(iii) $CuSO _4 \cdot 5 H _2 O =$ Blue vitriol
(iv) $ZnSO _4 \cdot 7 H _2 O =$ White vitriol

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